Multiply by the formula EkanyunenaPurvena -

73 x 9

Method:

There are two sides of a product.

Left Hand Side = Multiplicand – 1

Right Hand Side = Multiplier – Left Hand Side

So, Multiplicand × Multiplier = Multiplicand – 1/ Multiplier – Left Hand Side

73 - 1 = 72/9 - 72

= 729 - 72

=657

Ans: 657